<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>赋值运算符</title>
</head>
<body>
    
</body>
</html>
<script>    
    /*
        =
            可以将符号右侧的值赋值给符号左侧的变量
        +=
            a += 5;  等价与 a = a+5;
        -=  
            a -= 5;  等价于 a = a-5;
        *= 
            a *= 5;  等价于 a = a*5;
        /= 
            a /= 5;  等价于 a = a/5;
        %= 
            a %= 5;  等价于 a = a%5;
    */
    
    let a = 10;
    a = a + 5;
    a%=4;
    console.log("a = "+a); 
</script>